NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Luca David Opromolla

Banco de Portugal
Departamento de Estudos Económicos
Rua Francisco Ribeiro, 2
1150-165 Lisboa, Portugal

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NBER Working Papers and Publications

August 2017Goods and Factor Market Integration: A Quantitative Assessment of the EU Enlargement
with Lorenzo Caliendo, Fernando Parro, Alessandro Sforza: w23695
The economic effects from labor market integration are crucially affected by the extent to which countries are open to trade. In this paper we build a multi-country dynamic general equilibrium model with trade in goods and labor mobility across countries to study and quantify the economic effects of trade and labor market integration. In our model trade is costly and features households of different skills and nationalities facing costly forward-looking relocation decisions. We use the EU Labour Force Survey to construct migration flows by skill and nationality across 17 countries for the period 2002-2007. We then exploit the timing variation of the 2004 EU enlargement to estimate the elasticity of migration flows to labor mobility costs, and to identify the change in labor mobility costs ...
December 2015Productivity and Organization in Portuguese Firms
with Lorenzo Caliendo, Giordano Mion, Esteban Rossi-Hansberg: w21811
The productivity of firms is, at least partly, determined by a firm's actions and decisions. One of these decisions involves the organization of production in terms of the number of layers of management the firm decides to employ. Using detailed employer-employee matched data and firm production quantity and input data for Portuguese firms, we study the endogenous response of revenue-based and quantity-based productivity to a change in layers: a firm reorganization. We show that as a result of an exogenous demand or productivity shock that makes the firm reorganize and add a management layer, quantity based productivity increases by about 4%, while revenue-based productivity drops by more than 4%. Such a reorganization makes the firm more productive, but also increases the quantity produce...
July 2013The Tip of the Iceberg: A Quantitative Framework for Estimating Trade Costs
with Alfonso Irarrazabal, Andreas Moxnes: w19236
Casual empiricism suggests that additive trade costs, such as quotas, per-unit tariffs, and, in part, transportation costs, are prevalent. In spite of this, we have no broad and systematic evidence of the magnitude of these costs. We develop a new empirical framework for estimating additive trade costs from standard firm-level trade data. Our results suggest that additive barriers are on average 14 percent, expressed relative to the median price. The point estimates are strongly correlated with common proxies for trade costs. Using our micro estimates, we show that a reduction in additive trade costs produces much higher welfare gains and growth in trade flows than a similar reduction in multiplicative trade costs.

Published: Alfonso Irarrazabal & Andreas Moxnes & Luca David Opromolla, 2015. "The Tip of the Iceberg: A Quantitative Framework for Estimating Trade Costs," The Review of Economics and Statistics, MIT Press, vol. 97(4), pages 777-792, October. citation courtesy of

 
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